The phrase "a sharp signal in" is correct and usable in written English.
It can be used in contexts where you are describing a clear or distinct indication or message within a specific area or situation.
Example: "The researchers detected a sharp signal in the data that suggested a significant change in the environment."
Alternatives: "a clear indication in" or "a distinct signal in".
We measured higher f values in the foetal brain frontal cortex; however, this is likely to arise from partial volume effects with the adjacent cerebrospinal fluid spaces, which inherently displayed a sharp signal decay in DWI experiments due to the bulk movement of proton spins.
DWI has shown to have high sensitivity and specificity for detecting cholesteatoma; this is possible because of the peculiar composition of this lesion, whose high keratin content determines a sharp signal hyperintensity in these sequences [ 3, 4, 7].
A concerted international move in June to release oil stockpiles to stabilize world prices in response to the unrest in Libya sent a sharp signal to the Organization of the Petroleum Exporting States that its power to dictate oil prices was on the wane.
Additional signals occurred in the sugar region between 3.03 and 3.45 ppm, including a sharp signal at 3.18 ppm.
When the molecules reach peak rotation, they form a sharp signal response.
Notably, the corresponding raw data (i.e. residual strains) produce a sharper signal for yield via a transition in their global behavior.
The insert in F1 is located between strands β3 and β4 as part of a large 35-residue loop (residues 133 170) that is unstructured and highly dynamic, as shown by intense sharp signals in the [H,N]-HSQC spectra, and the presence of only weak intra-residue and sequential NOE interactions within the loop.
A sharp anodic signal in the forward scan followed by a cathodic peak (associated with the reduction of the oxidation product of HMNA) in the reverse scan produced a counter oxidation signal in the positive realm of glassy carbon electrode.
Heating to 70 °C in CD3CN resulted in sharper signals in the one-dimensional NMR spectrum, and through-space correlations between protons in the two ring components were identified in the H H ROESY spectrum (see Figure S3 in the Supporting Information).
In solvate V an extra sharp signal at 49.8 was assigned to methanol.
